MM32F3270 Evaluation Board User Guide Introduction

Insight Series MM32F3270 Evaluation Board User Guide v0.93

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MM32F3270 Evaluation Board User Guide

Introduction

MM32F3270 Evaluation Board (hereinafter referred to as MM32F3270 EVB), cooperating with ARM

Keil/IAR integrated development environment, MM32 Program programming software, MM32 FDS, and

embedded MM32-LINK-OB emulator, works as a hardware product for evaluating MCU performance in

the MindMotion MCU developing ecosystem.

Figure 1. MM32F3270 EVB appearance picture

Features

MM32F3270 EVB has the following features :

Support MindMotion MM32F3270 series MCU development evaluation

External clock 8MHz/32.768KHz

Support Keil uVision v5.0 / IAR EWARM v7.80 or later

Support MindMotion MM32 Firmware development suite (MM32 FDS)

Support MindMotion MM32 Program programming software

The MCU power supply of the development board is designed based on 3.3V

Embedded MM32-LINK-OB online emulator

Support SWD debugging interface and CDC virtual serial port

Emulator USB (Micro USB) socket power supply

USB Host/Device Type-C interface

4-Buttons/4-LEDs



2-UART three-pin socket (with CMOS level)

1-SPI five-pin socket (with CMOS level)

1-CAN two-pin socket with CAN driver and terminal matching resistance selection switch

1-1MBytes SPI Flash memory

1-256Bytes I2C EEPROM memory

1-3.5mm headphone jack for I2S L/R audio output

1-TF Card socket

2-RJ45 network socket

1-34-pin parallel bus connector, support 2.8’’ LCD display (optional)

CR1210 backup battery (customized)

1-Speaker

3-Analog input potentiometer

3-Switch: USB working mode, pin function and CAN terminal matching resistance

4-36pin is the same as the MCU pin sequence, with a double-row connector with a pitch of 0.1

inches

PCB board size: 6.4*3.2 inches



Connectors and Switches

The function of MM32F3270 EVB connector is shown in the table below :

Table 1. List of connector functions

Item Connector Function Descriptions

CN1 Micro USB Power/Emulator Power supply and debugging /download socket

CN2 2*18/0.1inch MCU Pins (1) MCU pin connector (pin No. 1-36)

CN3 Type-C USB USB MCU USB socket, supporting Host/Device mode

CN4 3.5mm L/R Headphone Headphone jack

CN5 RJ45 Ethernet (1) Ethernet socket, PHY address = 0x0

CN6 RJ45 Ethernet (2) Ethernet socket, PHY address = 0x1

CN7 3pin/0.1inch UART (1) UART socket, connected to MCU UART2

CN8 2*4/0.1inch Emulator pgm Reserved, unavailable to users

CN9 3pin/0.1inch UART (2) UART socket, connected to MCU UART3

CN10 5pin/0.1inch SPI SPI2 socket, NSS1 connects to PD11


CN12 2*17/0.1inch Parallel / LCD FSMC connector, supporting MDM2803 LCD module


CN14 2*10/0.1inch Ext. Debug port Debugging connector, available after MM32-LINK-OB upgrade

CN15 2pin/0.1inch CAN CAN socket, the board supports terminal matching resistance


CN17 TF Card SDIO SD/TF Card socket

The functions of MM32F3270 EVB toggle switch are shown in the table below:

Table 2. List of toggle switch functions

Item Switch Function Descriptions

SW1 2*2 USB Host / Device USB selection switch, functions are shown in PCB SW1 marking

SW2 2*2 Pin Functions MCU pin alternate switch, functions are shown in PCB SW2 marking

SW3 1*2 CAN Res. Selection Terminal resistance selection, switch to the right side to connect resistor



Peripherals

Key. LED. Socket The connection relationship and functions of MM32F3270 EVB key are shown in the table below:

Table 3. Connection relationship between key function and MCU

Item MCU Active Descriptions

K1 PB1 High User key, the key action signal is used as the wakeup

K2 PB2 Low User key, alternated with Ethernet ETH_INT1 signal

K3 PB10 Low User key

K4 PB0 Low User key

The connection relation of MM32F3270 EVB LED is shown in the table below:

Table 4. Connection relationship between LED and MCU

Item MCU Alternate Descriptions

LD1 PA15 I2S WS LED1, alternated with I2S WS signal

LD2 PB3 I2S SCK LED2, alternated with I2S SCK signal

LD3 PB4 I2S Standby LED3, alternated with I2S Standby signal

LD4 PB5 I2S SD LED4, alternated with I2S SD signal



The connection relationship between FSMC and MCU is shown in the table below:

Table 5. Connection relationship between FSMC and MCU

Pin MCU Function Descriptions

1 PD7 nCS Chip select signal, active low

2 PD13 RS RS signal

3 PD5 nWR WR signal, active low

4 PD4 nRD RD signal, active low

5 nRST nRST Reset signal, active low

6 PD15 D1 DATA 1

7 PD0 D2 DATA 2

8 PD1 D3 DATA 3

9 PE7 D4 DATA 4

10 PE8 D5 DATA 5

11 PE9 D6 DATA 6

12 PE10 D7 DATA 7

13 PE11 D8 DATA 8

14 PE13 D10 DATA 10

15 PE14 D11 DATA 11

16 PE15 D12 DATA 12

17 PD8 D13 DATA 13

18 PD9 D14 DATA 14

19 PD10 D15 DATA 15

20 --- Res. Reserved


22 PE12 D9 DATA 9

23 PF11 BL Backlight control, active high


25 VDD VDD VDD, 3.3V

26 PD14 D0 DATA 0

27 GND GND GND










The pin definition of MM32F3270 EVB UART(1) socket is shown in the table below:

Table 6. UART (1) socket pin definition table

Pin Function / MCU Alternate Descriptions

1 GND Signal ground

2 RXD / PA3 --- MCU UART2 Receive signal, CMOS level

3 TXD / PA2 ETH_MDIO MCU UART2 Send signal, CMOS level

The pin definition of MM32F3270 EVB UART(2) socket is shown in the table below:

Table 7. UART (2) socket pin definition table


1 GND Signal ground

2 RXD / PE0 --- MCU UART8 Receive signal, CMOS level

3 TXD / PE1 --- MCU UART8 Send signal, CMOS level

The pin definition of MM32F3270 EVB SPI socket is shown in the table below:

Table 8. SPI socket pin definition table


1 GND Signal ground

2 NSS1 / PD11 --- MCU PD11, CMOS level

3 MOSI / PB15 --- MCU SPI2 MOSI signal, CMOS level

4 MISO / PB14 --- MCU SPI2 MISO signal, CMOS level

5 SCK / PB13 ETH_TD1 MCU SPI2 SCK signal, CMOS level

The pin definition of MM32F3270 EVB CAN socket is shown in the table below:

Table 9. CAN socket pin definition table

Pin Function Alternate Descriptions

1 CANH --- CAN Bus High

2 CANL --- CAN Bus Low



Signal The connection relationship between MM32-LINK-OB CDC and MCU is shown in the table below:

Table 10. Connection relationship between MM32-LINK-OB CDC and MCU

MCU Function Descriptions

PA10 RXD MCU UART1 RXD and CDC TXD signal, must be set to IPU mode during initialization

PA9 TXD MCU UART1 TXD and CDC RXD signal

The connection relationship between analog signal and MCU is shown in the table below:

Table 11. Connection relationship between analog signal and MCU


PA1 ADC1(RV3) RV3, MCU Ain 1 signal, alternated with ETH_RCLK through switch SW2

PA4 ADC2(RV2) RV2, MCU Ain 4 signal

PA5 ADC3(RV1) RV1, MCU Ain 5 signal

The connection relationship between I2C EEPROM and MCU is shown in the table below:

Table 12. Connection relationship between I2C EEPROM and MCU


PB6 SCL MCU I2C1 SCL signal

PB7 SDA MCU I2C1 SDA signal

The connection relationship between SPI Flash and MCU is shown in the table below:

Table 13. Connection relationship between SPI Flash and MCU


PB12 NSS0 MCU SPI2 NSS0 signal, alternated with ETH_TD0 through switch SW2

PB13 SCK MCU SPI2 SCK signal

PB14 MISO MCU SPI2 MISO signal

PB15 MOSI MCU SPI2 MOSI signal

The connection relationship between SD/TF Card and MCU is shown in the table below:

Table 14. Connection relationship between SD/TF Card and MCU


PC6 DET SD/TF Card existence detection signal, low level is active, LD12 LED is on

PC8 DAT0 MCU SDIO DATA 0 signal




PC12 CLK MCU SDIO CLK signal

PD2 CMD MCU SDIO CMD signal



The connection relationship between Speaker and MCU in PWM mode is shown in the table below:

Table 15. Connection relationship between Speaker and MCU


PA8 Speaker MCU PWM output

The connection relationship between USB and MCU is shown in the table below:

Table 16. Connection relationship between USB and MCU


PC13 PWR_ON Host mode power output control, active low

PC2 CC1 USB Type-C CC1 Signal level detection

PC3 CC2 USB Type-C CC2 Signal level detection

PA11 DM MCU USB DM Signal

PA12 DP MCU USB DP Signal

The connection relationship between I2S and MCU is shown in the table below:

Table 17. Connection relationship between I2S and MCU


PB4 Standby MCU I2S audio output enable, active low, alternated with LD3 signal

PB5 SD MCU I2S SD Signal, alternated with LD4 signal

PB3 SCK MCU I2S SCK Signal, alternated with LD2 signal

PA15 WS MCU I2S WS Signal, alternated with LD1 function

PC7 MCLK MCU I2S MCLK Signal

The connection relationship between Ethernet PHY and MCU is shown in the table below:

Table 18. Connection relationship between Ethernet PHY and MCU


PA2 MDIO PHY Serial management data input/output

PC1 MDC PHY Serial management clock

PB12 TD0 Transmit data 0, alternated with SPI2_NSS0 through switch SW2

PB13 TD1 Transmit data 1

PC4 RD0 Receive data 0

PC5 RD1 Receive data 1

PB11 TX_EN Transmit enable

PA7 CRS_DV Carrier sense / Receive data valid

PC0 INT0 Ethernet PHY Interrupt 0, Active low

PB2 INT1 Ethernet PHY Interrupt1, Active low

PC7 MCLK External 50MHz clock input



PCB layout

The layout of each part of MM32F3270 EVB on the PCB is introduced according to the peripheral function.

MM32F3270 MCU chip, LDO (3.3V) power regulator, crystal/oscillator and pin signal connection socket

(the socket is not provided and soldered by default when the product leaves the factory) are the basic

parts of MM32F3270 EVB, which are shown in the red markings in the figure below.

Figure 2. MM32F3270 core function layout

The MM32F3270 EVB backup power supply is a CR1210 battery socket, which is shown in the figure below.

Due to logistics and transportation issues, the battery is not provided by default.

Figure 3. Backup battery layout

MM32F3270 Power / LDOOscillator/CrystalMCU Core

MM32F3270 Power / LDOOscillator/CrystalBattery



MM32F3270 EVB GPIO are composed of four keys and four LEDs. There is no reset button in this system.

If a reset operation is required, it must be realized through the emulator command or power-on again.

The layout is shown in the figure below.

Figure 4. GPIO device layout

MM32F3270 EVB UART is equipped with three sets of interfaces :

1. Emulator virtual serial port

2. The two sockets CN7 and CN9 connected to the edge of the PCB


Figure 5. UART device layout

MM32F3270 Power / LDOOscillator/CrystalKey / LED

MM32F3270 Power / LDOOscillator/CrystalUART



The MM32F3270 EVB SPI is evaluated in the following methods :

1. SPI Flash

2. Connect to the sockets CN10 on the edge of the PCB


Figure 6. SPI device layout

MM32F3270 EVB CAN Bus is evaluated in the following methods :

1. CAN Bus driver

2. Terminal matching resistance selection switch

3. Connect to the socket CN15 on the edge of the PCB


Figure 7. CAN Bus device layout

MM32F3270 Power / LDOOscillator/CrystalSPI

MM32F3270 Power / LDOOscillator/CrystalCAN



MM32F3270 EVB I2C Bus is connected to a 256Bytes EEPROM. The layout is shown in the figure below.

Figure 8. I2C EEPROM device layout

MM32F3270 EVB I2S audio connects an I2S audio decoder and two mono audio amplifiers, and outputs

to 3.5mm Headphone jack. The layout is shown in the figure below.

Figure 9. I2S Audio device layout

MM32F3270 Power / LDOOscillator/CrystalI2C

MM32F3270 Power / LDOOscillator/CrystalI2S Audio



MM32F3270 EVB analog input samples three potentiometer input methods to evaluate MCU analog

input performance. The layout is shown in the figure below.

Figure 10. Potentiometer analog level input device layout

MM32F3270 EVB FSMC / LCD connector supports external memory, FPGA and LCDM. The layout is

shown in the figure below.

Figure 11. FSMC/LCD interface device layout

MM32F3270 Power / LDOOscillator/CrystalPotentiometer

MM32F3270 Power / LDOOscillator/CrystalFSMC / LCD



MM32F3270 EVB SDIO connects to a TF Card socket and supports card insertion detection function. The

layout is shown in the figure below.

Figure 12. SDIO SD/TF Card interface device layout

MM32F3270 EVB PWM realize the function of audio output through simple driver. The layout is shown in

the figure below.

Figure 13. PWM audio output interface device layout

MM32F3270 Power / LDOOscillator/CrystalSDIO

MM32F3270 Power / LDOOscillator/CrystalPWM



MM32F3270 EVB Ethernet MAC realizes the function of time-sharing operation on two physical interfaces

through different PHY addresses. The layout is shown in the figure below.

Figure 14. Ethernet interface device layout

The MM32F3270 EVB USB socket realizes the Host/Device function through hardware switches. The

layout is shown in the figure below.

Figure 15. USB Host/Device interface device layout

MM32F3270 Power / LDOOscillator/CrystalEthernet

MM32F3270 Power / LDOOscillator/CrystalUSB



The MM32F3270 EVB alternate function selector switch is used to select PA1 function between analog

input and RMII_RCLK, PB12 between SPI2 NSS and RMII_TD0.The layout is shown in the figure below.

Figure 16. Control switch layout

MM32F3270 EVB on-board emulator, programmer and external emulation debugging connector make

up the function circuit. The layout is shown in the figure below.

Figure 17. Power/debug/download interface device layout

MM32F3270 Power / LDOOscillator/CrystalSwitch

MM32F3270 Power / LDOOscillator/CrystalEmulator



Schematic diagram

Evaluation board schematic diagram

Figure 18. MM32F3270 EVB schematic diagram-architecture

DAT

0C

MD

DET

CLK

DAT

1D

AT2

DAT

3

SDIO

SDIO

.Sch

nRST

I2S

I2S.

Sch TX

D0

RXD

0

MD

CM

DIO

nRST

TXD

1

RXD

1

CLK

I

CRS_

DV

TX_E

N

INT

AD

R

TXD

0

RXD

0

MD

CM

DIO

nRST

TXD

1

RXD

1

CRS_

DV

TX_E

N

INT

CLK

I

AD

R

C70

104P

VC

C4

GND

2

OUT

3

OE

1

X450

MHz

VD

D

R63

22CL

K50M

Hz

R40

4K7

VD

D

VD

D R58 4K7

R57 4K7

R41 4K7

R54

22R3

822

R55

22R3

322

R36

22

R39

22

SCL

SDA

I2C

I2C.

Sch NS

S0

SCK

MIS

OM

OSI

NSS1

SPI

SPI.S

chCA

N_RX

CA

N_TX

CAN

CAN.

Sch

PWR_

ONCC

1

DM

CC2

DP

USB

USB.

Sch

ADC

2(R

V2)

ADC

1(R

V3)

ADC

3(R

V1)

ADC

ADC.

Sch

K1

K4

LD4

LD3

LD2

LD1

K3

K2

WK

P

LED

&KEY

LED

&KEY

.Sch

TXD

1RX

D1

VD

D

C26

10uF

/16V

nRST

LD5

RED

R9 3K3

2

Vou

t3

Vin

1

LD11

17

U11

LD11

17-3.

3V

C23

104P

RXD

TXD

SWCL

KSW

DIO

RST

DM

DP

Emul

ator

Emul

ator.S

ch

C27

106P

C63

104P

C65

104P

TP1

TP3

TP2

VC

C1

DM

2

DP

3

ID4

GND

5

CN1

Micr

oUSB

VC

C

VC

C

RS

NWE

NOE

CS

LCD_

BL

D[0.

.15]

nRST

LCD

LCD.

Sch

D[0.

.15]

VD

D C60

104 P

R121

10K

C22

104P

C62

104P

C57

104P

C56

104P

C61

104P

C47

104P

C66

104P

C64

104P

VD

D

C25

105P

VD

D

VBAT

X1

X2

C15

20P

C7 20P

R25

510K

R29

510

X1 8MHz

X232

768Hz

PC14

PC15

C16

12P

C8 12P

BAT1

PA0 2 AP

1AP PA3

PA4 6AP

5AP PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

2526

2728

2930

3132

3334

3536

CN2

PA15

GN

D

PB0

VDD

PB15

GN

D

PB1

VDD

PB2

PB3

PB4

PB5

PB6

nRST

PB7

PB8

PB9

VDD

PB10

GN

D

PB11

VBAT

PB12

VDD

PB13

GN

D

PB14

PC0

GN

D

PC15

VDD

2C P1CP PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

4 1CP3 1CP

PD0

PD15

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PE0

PE15

PE1

3 EP2EP

5 EP4E P PE6

PE7 9EP

8EP

11E P0 1EP

31EP21EP PE

14

TXD

1RX

D1

TXD

2RX

D2

UART

UART

.Sch

mp1

mp6

mp2

mp5

mp3

mp4

DD VDN

G

GN

D

VDD DDV

D NG

DDVD N

G

GN

DVD

D

GN

DVD

D

2 X1X

PF0 2 FP

1FP4F P

3 FP PF5

PF6 8FP

7FP0 1FP

9FP

21FP11FP

41 FP31FP

0GP

51FP PG1

PG2

PG3

PG4

PG5

PG6

PG7

PG8

PG9

PG10

PG11

PG12

PG13

PG14

PG15

BOO

T0

PH2

GN

DVD

D

VDD

GN

D

RXD1

TXD

1VT

ref

1V

CC

2

nJTR

ST3

4

TDI

56

TMS

78

TCK

910

RTC

K11

12

TDO

1314

nRST

1516

DBGR

Q17

18

DBG

AC

K19

20

CN14

VD

D

VC

C

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

2526

2728

2930

3132

3334

3536

CN11

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

2526

2728

2930

3132

3334

3536

CN16

12

34

56

78

910

1112

1314

1516

1718

1920

2122

2324

2526

2728

2930

3132

3334

3536

CN13

SWD

IOSW

CLK

Spea

ker

Spea

ker

PA0

PA1

PA2

PA3

PA4PA5PA6PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14PA15

PB0

PB15

PB1PB2PB3

PB4PB5PB6PB7

PB8PB9

PB10PB11

PB12

PB13

PB14

PC0

PC15

PC1

PC2

PC3

PC4PC5

PC6

PC7

PC8

PC9

PC10PC11PC12

PC13

PC14

PD0

PD15

PD1PD2PD3PD4PD5

PD6PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PE0

PE15

PE1

PE2

PE3

PE4

PE5

PE6

PE7PE8PE9

PE10PE11PE12PE13PE14

PG0PG1

PG2

PG3

PG4

PG5

PG6

PG7

PG8

PG9PG10PG11PG12PG13PG14

PG15

PF0

PF1

PF2

PF3

PF4

PF5

PF6

PF7

PF8

PF9

PF10

PF11PF12

PF13PF14PF15

PE2

1

PE3

2

PE4

3

PE5

4

PE6

5

VB

AT

6

PC13

7

PC14

8

PC15

9

PF0

10

PF1

11

PF2

12

PF3

13

PF4

14

PF5

15

VSS

16

VD

D17

PF6

18

PF7

19

PF8

20

PF9

21

PF10

22

PH0

23

PH1

24

NRS

T25

PC0

26

PC1

27

PC2

28

PC3

29

VSS

A30

VRE

F-31

VRE

F+32

VDD

A33

PA0

34

PA1

35

PA2

36

PA3 37

VSS 38

VDD 39

PA4 40

PA5 41

PA6 42

PA7 43

PC4 44

PC5 45

PB0 46

PB1 47

PF11 49

PF12 50

VSS 51

VDD 52

PF13 53

PF14 54

PF15 55

PG0 56

PG1 57

PE7 58

PE8 59

PE9 60

VSS 61

VDD 62

PE10 63

PE11 64

PE12 65

PE13 66

PE14 67

PE15 68

PB10 69

PB11 70

VSS 71

VDD 72

PB12

73PB

1374

PB14

75PB

1576

PD8

77PD

978

PD10

79PD

1180

PD12

81PD

1382

VSS

83V

DD

84PD

1485

PD15

86PG

287

PG3

88PG

489

PG5

90PG

691

PG7

92PG

893

VSS

94V

DD

95PC

696

PC7

97PC

898

PC9

99PA

810

0PA

910

1PA

1010

2PA

1110

3PA

1210

4PA

1310

5PH

210

6V

SS10

7V

DD

108

PA14109 PA15110 PC10111 PC11112 PC12113 PD0114 PD1115 PD2116 PD3117 PD4118 PD5119 VSS120 VDD121 PD6122 PD7123 PG9124 PG10125 PG11126 PG12127 PG13128 PG14129 VSS130 VDD131 PG15132 PB3133 PB4134 PB5135 PB6136 PB7137 PH3138 PB8139 PB9140 PE0141 PE1142 VSS143 VDD144

PB2 48

U10

MM3

2F32

77G

9P

BOOT0

X1 X2

PH2

R122

10K

nRST

GND

GND

GND

GND

GN

D

GN

D

GN

D

GND

GND

GND

GN

DVD

D

VDD

VDD

VDD

VDD

VDD

VDD

VDD

VDD

VDD

VDD

A1

TXD

2RX

D2A2

A3

TXD

1RX

D1

USB_

DMUS

B_DP

SWDI

OSW

CLK

LD1

K1

K2

LD2

LD3

LD4

SCL

SDA

CA

N_RX

CA

N_TXK

3K

4

NSS0

SCK

MIS

OM

OSI

USB_

CC1

USB_

CC2

OSC3

2IOS

C32O

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PC14

PC15

FSM

C_D2

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PE0

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PF0

PF1

PF2

PF3

PF4

PF5

PF6

PF7

PF8

PF9

PF10

PF11

PF12

PF13

PF14

PF15

PG0

PG1

PG2

PG3

PG4

PG5

PG6

PG7

PG8

PG9

PG10

PG11

PG12

PG13

PG14

PG15

PH2

PH3

ETH_

CRS_

DVET

H_M

DIO

ETH_

RCLK

ETH_

TX_E

NET

H_TD

1ET

H_TD

0

ETH_

INT1

ETH_

INT0

ETH_

MD

C

ETH_

RD0

ETH_

RD1

SD_D

ET

I2S_

MCL

K

SD_C

LK

SD_D

AT3

SD_D

AT2

SD_D

AT1

SD_D

AT0

SD_C

MD

FSM

C_NO

EFS

MC_

NWE

FSM

C_CS

NSS1

FSM

C_RS

FSM

C_D3

FSM

C_D1

3FS

MC_

D14

FSM

C_D1

5

FSM

C_D0

FSM

C_D1

FSM

C_D4

FSM

C_D5

FSM

C_D6

FSM

C_D7

FSM

C_D8

FSM

C_D9

FSM

C_D1

0FS

MC_

D11

FSM

C_D1

2

TXD

3RX

D3

LCD_

BL

PH1

PH0

PC14

PC15

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB15

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PC0

PC15

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PC14

PD0

PD15

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PE0

PE15

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PG0

PG1

PG2

PG3

PG4

PG5

PG6

PG7

PG8

PG9

PG10

PG11

PG12

PG13

PG14

PG15

PF0

PF1

PF2

PF3

PF4

PF5

PF6

PF7

PF8

PF9

PF10

PF11

PF12

PF13

PF14

PF15

PH2

BOO

T0

X1 X2

TXD

1RX

D1

SWD

IOSW

CLK

CLK5

0MH

z

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10

D11

D12

D13

D14

D15

MC

LK

PWR_

ON

Conn

ectio

n



Figure 19. MM32F3270 EVB schematic diagram-GPIO

Figure 20. MM32F3270 EVB schematic diagram-UART

LD3

BLUELD4

YELLOW

LD1

REDLD2

GREEN

R93

4K7

R74

3K3

R67

2K2

R35

2K2R32 1K

R60 1K

R73 1K

R88 1KK4

K3

K2

K1 VDDVDD

R1231M

K1

K4

LD4

LD3

LD2

LD1

K3

K2

C73

102PR1261M

WKP

R8 510R12 510TXD1

RXD1

R24 510R26 510TXD2

RXD2

123

CN7

123

CN9



Figure 21. MM32F3270 EVB schematic diagram-SPI

Figure 22. MM32F3270 EVB schematic diagram-CAN Bus

NSS0

SCK

MISO

MOSI

C48104P

VDD

S1

DO2

WP3

GND4 DI 5

C 6

HOLD 7

VCC 8U12 25P80

R72100K R69

100K

VDD

R87 51R86 51

R85 51

R81 51

MOSI

SCKMISO

NSS1

12345 CN10

XH2.54V-5P

R68 51

R44 51R61 51R65 51

NSS1

MOSISCK

MISO

CAN_RX

CAN_TX

C33104P

VCC

VDD

TXD1

GND2

VCC3

RXD4 VIO 5

CANL 6

CANH 7

S 8

U13 TJF1051R82120

12

CN15

R71 51

R70 51

SW3MSK12C01



Figure 23. MM32F3270 EVB schematic diagram-I2C Bus

Figure 24. MM32F3270 EVB schematic diagram-SDIO/TF Card

R344K7

R664K7

E0 1

E1 2

E2 3

VSS 4

SDA5

SCL6

WC7

VCC 8U9 24C02

C21104P

VDD

SCL

SDA

R59 51

R64 51

DAT0

CMD

DET

CLK

C72104P

C71105P

nCS/DAT32MOSI/CMD3RSV/DAT21

VDD4SCLK/CLK5GND6MISO/DAT07RSV/DAT18

G40 G30 G20 G10

9

10

CN17 TF_SD

R84

3K3

LD12

RED

DAT1

DAT2DAT3

VDD

R77 22R79 22R80 22

R78 22

R75 22R76 22



Figure 25. MM32F3270 EVB schematic diagram-I2S Audio

WS

SD SCK

C18

104P

MC

LK

VDD

SDIN

1

DEM

/SC

K2

LRC

K3

MC

LK4

VQ

5FI

LT+

6AO

UTL

7

GND 8VA9

AOU

TR10

U8

CS4

344

C19

104P

C20

105P

C17

106P

32 1CN

4He

adph

one

C10

105P

C34

471P

R97

20K

C11

105P

R102

20K

R101

20K

R109

510

R110

510

C42

222P

C43

222P

Stan

dby

1

Bypa

ss2

Vin

+3

Vin

-4

Uou

t15

VCC

6

GN D

7

Vou

t28

U4

TS48

71

C9

105P

C4

106P

C32

105P

VCC

C36

471P

R98

20K

Stan

dby

1

Bypa

ss2

Vin

+3

Vin

-4

Uou

t15

VCC

6

GND

7

Vou

t28

U5

TS48

71

C6

105P

C5

106P

C35

104P

VCC

R48

22R4

922

R50

22R5

122

VCC

R47

22St

andb

y

R108

10K

VCC



Figure 26. MM32F3270 EVB schematic diagram-Analog Input

Figure 27. MM32F3270 EVB schematic diagram-FSMC/LCD Interface

C12104P

VDD

RV110K(3296w)

R18

1K

VDD

ADC2(RV2)

ADC1(RV3)

ADC3(RV1)

C14104P

RV310K

R20

1K

VDD

C13104P

RV210K

R19

1K

1234

RESET5

DE24

VDD25

PD0 26

GND27

VSYNC28 BLC/DotClk23

PD9 22

PD1 6

PD2 7

PD3 8

PD4 9

PD5 10

PD6 11

PD7 12

PD8 13

PD10 14

PD11 15

PD12 16

PD13 17

PD14 18

PD15 19

PD16 20

PD17 21HSYNC(SDO)29

SDA (SDI)30

XL 31

XR 32

YD 33

YU 34C49104P

VDD

R91 51

R92 51R89 51RS

NWENOE

CS

LCD_BL

D[0..15]D[0..15]

nRST

R90 51

R62 51

R94 51

D0D1D2D3D4D5D6D7D8D9D10D11D12D13D14D15

CSRSWR/SCLRD

CN12 MDM2803



Figure 28. MM32F3270 EVB schematic diagram-Ethernet (1)

VDD

2A1

LED

2/nI

NTS

EL2

LED

1/R

EGOF

F3

XTA

L24

XTA

L1/C

LKIN

5VD

DCR

6

RXD

1/M

ODE

17

RXD

0/M

ODE

08

VDD

IO9

RXER

/PHY

AD0

10CR

S_DV

/MO

DE2

11

MD

IO12

MD

C13

nIN

T/R

EFC

LKO

14

nRST

15

TXEN

16

TXD

017

TXD

118

VDD

1A19

TXN

20

TXP

21

RXN

22

RXP

23

RBIA

S24

VSS

0

U6

LAN8

720

VDD

C51

104P

R27

12K

C58

106P

VDD

C55

104P

C50

104P

R117

100

C52

106P

1 2 36 7 8

9 10 11 14 15 16

TR1

TS81

21C

C69

104P

VDD

1 2 3 4 5 6 7 8

CN5

RJ4

5

R95

75R9

975

R119

10K

R52

22

R10351

R11151

R10451

R11251

R53

22R3

722

C37

102P

LD8

GR

EEN

LD9

YELL

OW

R4

4K7

R5

4K7

VDD

CLK

I

TXD

0

RXD

0

MD

CM

DIO

nRST

TXD

1

RXD

1

INT

CRS_

DV

TX_E

N

ADR



Figure 29. MM32F3270 EVB schematic diagram-Ethernet (2)

VDD

2A1

LED

2/nI

NTS

EL2

LED

1/R

EGOF

F3

XTA

L24

XTA

L1/C

LKIN

5VD

DCR

6

RXD

1/M

ODE

17

RXD

0/M

ODE

08

VDD

IO9

RXER

/PHY

AD0

10CR

S_DV

/MO

DE2

11

MD

IO12

MD

C13

nIN

T/R

EFC

LKO

14

nRST

15

TXEN

16

TXD

017

TXD

118

VDD

1A19

TXN

20

TXP

21

RXN

22

RXP

23

RBIA

S24

VSS

0

U7

LAN8

720

TXD

0

RXD

0

MD

CM

DIO

nRST

TXD

1

RXD

1

VDD

C53

104P

R28

12K

C59

106P

INT

CRS_

DV

TX_E

N

VDD

C68

104P

C67

104P

R118

100

C54

106P

1 2 36 7 8

9 10 11 14 15 16

TR2

TS81

21C

C46

104P

VDD

1 2 3 4 5 6 7 8

CN6

RJ4

5

R96

75R1

0075

R120

10K

CLK

I

R10551

R11351

R10651

R11451

R42

22R4

322

C38

102P

LD10

GR

EEN

LD11

YELL

OW

R6

4K7

R7

4K7

VDD

R56

22

ADR



Figure 30. MM32F3270 EVB schematic diagram-USB Host/Device

Figure 31. MM32F3270 EVB schematic diagram-PWM Speaker

PWR_ON

R124 22R125 22

OUT 1

GND 2OC3

EN4

IN5U1

TPS2041B

VCC

C2104P

C3106P

R31M

VBUS

R464K7

R3136K

VDD

R454K7

R3036K

VDD

GND A1

VBUS A4CC1 A5D1+ A6D1- A7SBU1 A8VBUS A9

GND A12

GNDB12

VBUSB9 SBU2B8 D-B7 D+B6 CC2B5 VBUSB4

GNDB1

00

CN3USB_C_16PIN

SW1

MSS22C02Device

Host

CC1

DMCC2

DP

SP1

VDD

D21N4148

T1SI2302C28

104P R8310K

Speaker



Figure 32. MM32F3270 EVB schematic diagram-signal connection

A1 TXD2

RXD2 A2 A3 TXD1

RXD1

USB_

DMUS

B_DP

SWDI

OSW

CLK

LD1

K1 K2 LD2

LD3

LD4

SCL

SDA

CAN_

RXCA

N_TX

K3K4NSS0

SCK

MIS

OM

OSI

USB_

CC1

USB_

CC2

PWR_

ON

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13

PA14

PA15

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13

PC14

PC15

FSM

C_D2

PA0/

TIM

2_C

H1/

TIM

2_ET

R/T

IM5_

CH

1/TI

M8_

ETR

/UAR

T2_C

TS/U

ART4

_TX/

ETH

_MII_

CR

S/AD

C12

3_IN

0/C

OM

P12_

INP

0/C

OM

P1_I

NM

2/W

KP0

PA1

/TIM

2_C

H2/

TIM

5_C

H2/

UA

RT2

_RTS

/UAR

T4_R

X/ET

H_M

II_R

X_C

LK/E

TH_R

MII_

REF

_C

LK/A

DC

123_

IN1/

CO

MP1

2_IN

P1P

A2/T

IM2_

CH

3/TI

M5_

CH

3/U

ART2

_TX/

CP

T2_O

UT/

ETH

_MD

IO/A

DC

123_

IN2/

CO

MP1

2_IN

P2/C

OM

P2_I

NM

2/W

KP2

PA3

/TIM

2_C

H4/

TIM

5_C

H4/

UA

RT2

_RX/

ETH

_CO

L/AD

C12

3_IN

3/C

OM

P12_

INP

3P

A4/S

PI1_

NS

S/I2

S1_

WS/

SPI

3_N

SS/

I2S

3_W

S/U

ART5

_TX/

ADC

12_I

N4

/DA

C1_

OU

T/C

OM

P12_

INM

0P

A5/T

IM2_

CH

1/TI

M2_

ETR

/TIM

8_C

H1N

/SPI

1_SC

K/I2

S1_C

K/U

ART5

_RX/

ADC

12_I

N5

/DAC

2_O

UT/

CO

MP1

2_IN

M1

PA6

/TIM

1_B

KIN

/TIM

3_C

H1/

TIM

8_B

KIN

/SPI

1_M

ISO

/I2S1

_MC

K/C

PT1

_OU

T/AD

C12

_IN

6P

A7/T

IM1_

CH

1N/T

IM3_

CH

2/TI

M8_

CH

1N/S

PI1_

MO

SI/I2

S1_S

D/C

RS

_SYN

C/E

TH_M

II_R

X_D

V/ET

H_R

MII_

CR

S_D

V/A

DC

12_I

N7

PA8

/MC

O1/

TIM

1_C

H1

PA9

/TIM

1_C

H2/

I2C

1_S

CL/

UA

RT1

_TX/

US

B_V

BUS

PA1

0/TI

M1_

CH

3/I2

C1_

SD

A/U

ART1

_RX/

US

B_ID

PA1

1/TI

M1_

CH

4/U

AR

T1_C

TS/C

PT1

_OU

T/C

AN

1_R

X/U

SBD

MPA

12/T

IM1_

ETR

/UAR

T1_R

TS/C

PT2_

OU

T/C

AN1_

TX/U

SBD

PP

A13/

JTM

S_S

WD

IO/U

SB_

VB

US_

ON

PA1

4/JT

CK_

SW

CLK

/I2C

1_SD

AP

A15/

JTD

I/TIM

2_C

H1/

TIM

2_E

TR/I2

C1_

SC

L/S

PI1_

NS

S/I2

S1_W

S/S

PI3_

NS

S/I2

S3_W

S

PB0

/TIM

1_C

H2N

/TIM

3_C

H3/

TIM

8_C

H2N

/UAR

T6_T

X/E

TH_M

II_R

XD2/

ADC

12_I

N8

PB1

/TIM

1_C

H3N

/TIM

3_C

H4/

TIM

8_C

H3N

/UAR

T6_R

X/ET

H_M

II_R

XD3/

ADC

123_

IN9

PB2

/BO

OT1

PB3/

JTD

O/T

RAC

ESW

O/T

IM2_

CH

2/SP

I1_S

CK

/I2S1

_CKS

PI3

_SC

K/I2

S3_C

KP

B4/

NJT

RST

/TIM

3_C

H1/

SP

I1_M

ISO

/I2S

1_M

CK

/SP

I3_M

ISO

/I2S

3_M

CK

PB5/

TIM

3_C

H2/

SPI1

_MO

SI/I2

S1_S

D/S

PI3

_MO

S/I2

S3_S

D/W

KP4

PB6

/TIM

4_C

H1/

I2C

1_S

CL/

UA

RT1

_TX/

UAR

T7_T

XP

B7/T

IM4_

CH

2/I2

C1_

SD

A/U

ART

1_R

X/U

ART

7_R

X/FM

C_N

ADV

PB

8/TI

M4_

CH

3/I2

C1_

SC

L/C

PT1_

OU

T/C

AN1_

RX/

ETH

_MII_

TXD

3P

B9/T

IM4_

CH

4/I2

C1_

SDA/

SPI

2_N

SS/

I2S2

_WS/

CPT

2_O

UT/

CAN

1_TX

PB1

0/TI

M2_

CH

3/I2

C2_

SC

L/S

PI2_

SCK

/I2S2

_CK

/UA

RT3

_TX/

ETH

_MII_

RX_

ERPB

11/T

IM2_

CH

4/I2

C2_

SDA

/UAR

T3_R

X/ET

H_M

II_TX

_EN

/ETH

_RM

II _TX

_EN

PB1

2/TI

M1_

BK

IN/S

PI2_

NS

S/I2

S2_W

S/E

TH_M

II_TX

D0/

ETH

_RM

II_TX

D0

PB1

3/TI

M1_

CH

1N/S

PI2_

SCK

/I2S

2_C

K/U

ART3

_CTS

/ETH

_MII_

TXD

1/ET

H_R

MII_

TXD

1P

B14/

TIM

1_C

H2N

/TIM

8_C

H2N

/SPI

2_M

ISO

/I2S

2_M

CK/

UA

RT3

_RT S

PB

15/T

IM1_

CH

3N/T

IM8_

CH

3N/S

PI2

_MO

SI/I

2S2_

SD

/WK

P5

PC

0/I2

C1_

SCL/

AD

C12

3_IN

10P

C1/

I2C

1_SD

A/E

TH_M

DC

/AD

C12

3_IN

11P

C2/

I2C

2_SC

L/S

PI2_

MIS

O/I2

S2_

MC

K/E

TH_M

II_TX

D2/

AD

C12

3_IN

12P

C3/

I2C

2_SD

A/S

PI2_

MO

SI/I

2S2_

SD/E

TH_M

II_TX

_CLK

/AD

C12

3_IN

13PC

4/ET

H_M

II_R

XD0/

ETH

_RM

II_R

XD0/

ADC

23_1

4PC

5/ET

H_M

II_R

XD1/

ETH

_RM

II_R

XD1/

ADC

23_1

5/W

KP3

PC

6/TI

M3_

CH

1/TI

M8_

CH

1/I2

C1_

SC

L/S

PI2_

MIS

O/I2

S2_M

CK

/UAR

T6_T

XP

C7/

TIM

3_C

H2/

TIM

8_C

H2/

I2C

1_S

DA/

SPI

3_M

ISO

/I2S3

_MC

K/U

AR

T6_R

XP

C8/

TIM

3_C

H3/

TIM

8_C

H3/

I2C

2_SC

L/SD

IO_D

0PC

9/M

CO

2/TI

M3_

CH

4/TI

M8_

CH

4/I2

C2_

SD

A/S

DIO

_D1

PC

10/S

PI3_

SCK

/I2S

3_C

K/U

ART3

_TX/

UAR

T4_T

X/SD

IO_D

2P

C11

/SPI

3_M

ISO

/I2S

3_M

CK/

UA

RT3

_RX/

UAR

T4_R

X/SD

IO_D

3P

C12

/SPI

3_M

OSI

/UAR

T5_T

X/SD

IO_C

KP

C13/

TAM

P-R

TC/W

KP1

PC

14/O

SC

32_I

NP

C15

/O

SC

32_

OU

T

PD

0/U

ART8

_TX/

CA

N1_

RX/

FSM

C_D

A2P

D1/

UAR

T8_R

X/C

AN

1_TX

/FSM

C_D

A3P

D2/

TIM

3_E

TR/U

ART5

_RX/

SD

IO_C

MD

PD

3/S

PI2_

SC

K/I2

S2_C

K/U

ART2

_CTS

/FS

MC

_CLK

PD

4/S

PI3_

SC

K/I2

S3_C

K/U

ART2

_RTS

/FS

MC

_NO

EP

D5/

SPI

3_M

ISO

/I2S3

_MC

K/U

AR

T2_T

X/FS

MC

_NW

EPD

6/S

PI3

_MO

SI/I

2S3_

SD

/UA

RT2

_RX/

FSM

C_N

WAI

T1P

D7/S

PI3_

NS

S/I2

S3_

WS

/FS

MC

_NE

1P

D8/

UAR

T3_T

X/FS

MC

_DA1

3P

D9/

UAR

T3_R

X/FS

MC

_DA

14P

D10

/I2C

1_SC

L/FS

MC

_DA1

5P

D11

/I2C

1_SD

A/U

ART3

_CTS

/FSM

C_A

16

PD

13/T

IM4_

CH

2/S

PI3_

MIS

O/I2

S3_

MC

K/F

SMC

_A18

PD

12/T

IM4_

CH

1/S

PI3_

SC

K/I2

S3_C

K/U

ART3

_RTS

/FS

MC

_A17

PD

14/T

IM4_

CH

3/S

PI3_

MO

SI/F

SM

C_D

A0P

D15

/TIM

4_C

H4/

SPI

3_N

SS/

I2S3

_WS

/FSM

C_D

A1

PE0

/TIM

4_ET

R/U

AR

T8_R

X/FS

MC

_NB

L0P

E1/U

AR

T8_T

X/FS

MC

_NB

L1P

E2/T

RA

CE

CLK

/SP

I2_S

CK

/I2S

2_C

K/E

TH_M

II_TX

D3/

FSM

C_A

23P

E3/T

RA

CE

D0/S

PI2_

NS

S/I2

S2_W

S/F

SM

C_A

19P

E4/T

RA

CE

D1/S

PI2_

NS

S/I2

S2_W

S/F

SM

C_A

20P

E5/T

RA

CE

D2/I2

C2_

SCL

/SPI

2_M

ISO

/I2S

2_M

CK

/FSM

C_A

21P

E6/

TRAC

ED

3/I2

C2_

SD

A/S

PI2

_MO

SI/I

2S2_

SD

/FS

MC

_A22

PE7

/TIM

1_ET

R/U

AR

T7_R

X/FS

MC

_DA

4P

E8/T

IM1_

CH

1N/U

ART

7_TX

/FS

MC

_DA

5P

E9/T

IM1_

CH

1/F

SMC

_DA6

PE1

0/TI

M1_

CH

2N/F

SMC

_DA7

PE1

1/TI

M1_

CH

2/S

PI1

_NS

S/I2

S1_

WS

/FS

MC

_DA8

PE1

3/TI

M1_

CH

3/S

PI1_

MIS

O/I2

S1_M

CK/

FSM

C_D

A10

PE1

2 /TI

M1_

CH

3N/S

PI1

_SC

K/I2

S1_

CK

/FS

MC

_DA9

PE

14/T

IM1_

CH

4/S

PI1

_MO

SI/I

2S1_

SD

/FS

MC

_DA

11P

E15/

TIM

1_B

KIN

/FS

MC

_DA1

2

PF0

/FS

MC

_A0

PF1

/FS

MC

_A1

PF2

/FS

MC

_A2

PF3

/FS

MC

_A3

PF4

/FS

MC

_A4

PF5

/FS

MC

_A5

PF6

/AD

C3_

IN4

PF7

/AD

C3_

IN5

PF8

/AD

C3_

IN6

PF9

/AD

C3_

IN7

PF1

0/AD

C3_

IN8

PF1

1

PF1

3/FS

MC

_A7

PF1

2/FS

MC

_A6

PF1

4/FS

MC

_A8

PF1

5 /FS

MC

_A9

PG

0/F

SM

C_A

10P

G1/

FS

MC

_A11

PG

2/F

SM

C_A

12P

G3/

FS

MC

_A13

PG

4/F

SM

C_A

14P

G5/

FS

MC

_A15

PG

6P

G7

PG

8P

G9/

FSM

C_N

E2P

G10

/FS

MC

_NE3

PG

11

PG

13/F

SM

C_A

24P

G12

/FS

MC

_NE4

PG

14/F

SM

C_A

25P

G15

PH

2P

H3/

BOO

T0

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PE0

PE1

PE2

PE3

PE4

PE5

PE6

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PF0

PF1

PF2

PF3

PF4

PF5

PF6

PF7

PF8

PF9

PF10

PF11

PF12

PF13

PF14

PF15

PG0

PG1

PG2

PG3

PG4

PG5

PG6

PG7

PG8

PG9

PG10

PG11

PG12

PG13

PG14

PG15

PH0

PH1

I2S_

WS

ETH_

CRS

_DV

ETH_

MDI

O

ETH_

RCL

K

ETH_

TX_E

N

ETH_

TD1

ETH_

TD0

ETH_

INT1

SW

2M

SS2

2C02

ETH_

INT0

ETH_

MDC

ETH_

RD0

ETH_

RD1

SD_D

ETI2

S_M

CLK

SD_C

LKSD

_DAT

3SD

_DAT

2SD

_DAT

1SD

_DAT

0

SD_C

MD

FSM

C_N

O EFS

MC_

NWE

FSM

C_C S

NSS1

FSM

C_RS

FSM

C_D3

FSM

C_D1

3FS

MC_

D14

FSM

C_D1

5

FSM

C_D0

FSM

C_D 1

FSM

C_D4

FSM

C_D5

FSM

C_D6

FSM

C_D7

FSM

C_D8

FSM

C_D9

FSM

C_D1

0FS

MC_

D11

FSM

C_D1

2

TXD3

RXD3

LCD_

BL

Wak

eup

PH2

PH3



MM32-LINK-OB schematic

The function of the MM32-LINK-OB emulator embedded in MM32F3270 EVB is exactly the same as that

of the independent standard MM32-LINK emulator, and the firmware upgrade code is also the same. The

embedded MM32-LINK emualtor share the common power supply with the evaluation target MCU.

When users emulate or download something through emulator, one end of the USB cable should be

inserted into the CN1 socket, and the other end should be connected to the USB port of PC. When the

power of emulator works normally, the power indicator light LD5 would be on. As the USB connection

indicator, LD6 would turn off from red and LD7 would turn to green when MM32-LINK-OB is successfully

connected to the computer.

Figure 33. MM32F3270 EVB schematic diagram-MM32-LINK-OB

RXDTXD

VDD _E

LED1

DM

R110K

DP

R23K3

tSW

CLK

LED2

VDD_E

VDD_

E

VDD _E VDD_E

C41104P

R107100K

VDD_

E

X1_E

X2_E

VDD _E

C4420P

LED1

C4520P

X1_E

R115 510K

X2_E

R116510

tRST

C39104P

C31104P

C29104P

GND

GND

GND

LD7RED

LD6GREEN

GND

GNDLED2

tIC

R2110K

tSW

DIO

R2210K

tSW

O

VDD

SWDIO_E

SWCL

K_E

RST_E

Vin3 Vout 1

2

XC6206-SOT23

U2XC6206-3.3V

C110uF/16V

C30106P

VCC

SPK

oVD

tVD

tVC

WEAKU P

R13 2K2R14 51

R15100K

VBA T1

PC132

PC143

PC154

PD0_OSCI5

PD1_OSCO6

NRST7

VSSA8

VDD A9

PA010

PA111

PA212

PA3

13

PA4

14

PA5

15

PA6

16

PA7

17

PB0

18

PB1

19

PB2

20

PB10

21

PB11

22

DVSS

23

VDD

24

PB12 25PB13 26PB14 27PB15 28PA8 29PA9 30PA10 31PA11 32PA12 33PA13 34VSS 35VDD 36

PA14

37PA

1538

PB3

39PB

440

PB5

41PB

642

PB7

43B

OO

T044

PB8

45PB

946

VSS

47VD

D48

U3MM32L373PF

SWCLKSWDIO

RSTR16 51R17 51R23 51

D1

1N4148

C40104P

C24104P

VDD_E

VDDCLK

DIOGNDRST

CN8 SWD

SWDIO_ESWCLK_E

GND

VDD_E

RST_E

X3 8MHZ

DMDPR10 22

R11 22

GND

TP4

TP5



Configuration

Emulator configuration The function of the MM32-LINK-OB emulator embedded in MM32F3270 EVB is the same as that of the

independent MM32-LINK, and the software configuration method is also the same.

The initial default state of MM32-LINK is shown in the figure below.

Figure 34. MM32-LINK-OB configuration dialog

Programmer configuration Please refer to "MM32-LINK Programmer User Manual", download link:

http://www.mindmotion.com.cn/download.aspx?cid=1243



History

Release time Revision Update

2021/01/20 V0.90 Initial version

2021/02/18 V0.91 Modify text and unit errors

2021/02/20 V0.92 Modify text and unit errors

2021/02/21 V0.93 Add Ethernet PHY connection relationship table

Documents

MM32F3270 Evaluation Board User Guide Introduction